W3C

WoT Discovery

23 Nov 2020

Agenda

Attendees

Present
Kaz_Ashimura, Michael_McCool, Christian_Glomb, Farshid_Tavakolizadeh, Andrea_Cimmino, Kunihiko_Toumura, Tomoaki_Mizushima, Jack_Dickinson
Regrets
Chair
McCool
Scribe
kaz, FarshidT

Contents


<kaz> scribenick: kaz

Prev minutes

Nov-16

McCool: typo "rate limit of" to be fixed as "rate limiting"

(fixed)

McCool: approved

Cancellations

McCool: McCool will be not available Dec 14, 21 and 28. So we'll cancel those calls.
... and the first meeting in Jan 2021 should be Jan 11

Kaz: note that Jan 11 will be a bank holiday in Japan

McCool: right
... we can do Jan 4 and cancel Jan 11 instead, then

Publication status

draft for publication

<inserted> scribenick: FarshidT

Kaz: FPWD is already released: https://w3c.github.io/wot-discovery/publication/1-fpwd/index.html

<kaz> minor editorial issues (already fixed)

Kaz: there were some minor issues (css, publication date, duplicate ID)

<McCool> proposal: publish the above document as the FPWD of the WoT Discovery deliverable

<McCool> proposal: publish https://w3c.github.io/wot-discovery/publication/1-fpwd/index.html as the FPWD of the WoT Discovery deliverable

RESOLUTION: publish https://w3c.github.io/wot-discovery/publication/1-fpwd/index.html as the FPWD of the WoT Discovery deliverable

<kaz> scribenick: kaz

Issues and PRs

McCool: cross-referenced issue on signing
... created for wot-profile

wot-profile issue 55

McCool: cross referenced with a TD issue

TD issue 940

JSON Web Signature (RFC7515)

McCool: (goes through the comments in the issue)

McCool's comments

McCool: let's create an issue for wot-discovery as well

Farshid: doesn't LD-proof handle this?

McCool: not exactly

new issue 104 for wot-discovery

Farshid: should they handle it in a canonical way?

Kaz: so we need to define "canonicalized" here. right?

McCool: yes
... adds a comment "Alternative: the "signer" could canonicalize internally, and this might be better (less fragile)."

updated comment

McCool: (goes through the other issues)

Issue 99

McCool: (adds a comment)

additional comment

Issue 100

McCool: (adds a comment in response to Farshid's comment)

McCool's response

McCool: joint meeting with SDW/OGC expected on Dec 10

Farshid: (explains the examples on how to deal with geospatial queries base on the OTC SensorThings)

OGC SensorThings

updated comments

wot issue 939 also updated

Issue 98

McCool: add "Geolocation" label to Issue 98 above
... (also adds links for "Geolocation" label and "Timestamps" label to the comment

updated comment including resources for Geolocation ad Timestamps

Issue 97

McCool: in general, SPARQL is expensive
... problems with federation here
... delegate queries not to be allowed

Andrea: (gives some possible scenario)

McCool: let's think about several possible scenarios
... let's wipe out what would be OK
... 3. returning link to other directories so a client can also query them is permitted

Andrea: wondering about the model

Kaz: maybe it would make sense to have some more concrete description on the scenarios 1, 2 and 3

Andrea: ok

McCool: let's think a bit more
... 1. unclear
... 2. a client may do an introduction and get multiple results, send queries to exploration services in parallel, and merge the results
... update on point 1
... 1. (limited to delegated/recursive federation, where a directory queries other directories on a client's behalf)

Andrea: if we stick with SPARQL federation, the point 1 would be a bit problematic
... SPARQL doesn't allow "recursion" per se, delegated endpoints must be known in advance

McCool: let's allow SPARQL delegation for the moment, but add an editor's note regarding the DoS concern.
... (also adds comments to option 3)
... these links may not be in a TD, so technically may be out-of-band info
... which would allow us to associate them with a given TD

Farshid: related to 34

Issue 34

Farshid: link section inside TD

McCool: we need some more text to explain those points
... any volunteers?

Andrea: can work on #1

McCool: and myself work on #2

PR

PR 103

Farshid: minor fix on JSONPath, etc.

McCool: wouldn't it effect the FPWD publication?

Kaz: no

McCool: OK
... (and merges PR 103)

[adjourned]

Summary of Action Items

Summary of Resolutions

  1. publish https://w3c.github.io/wot-discovery/publication/1-fpwd/index.html as the FPWD of the WoT Discovery deliverable
[End of minutes]

Minutes manually created (not a transcript), formatted by David Booth's scribe.perl version (CVS log)
$Date: 2020/12/07 12:19:23 $